/* Return the reciprocal of the square root of X.
   Copyright (C) 2025 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <math.h>

FLOAT
M_DECL_FUNC (__rsqrt) (FLOAT x)
{
  if (islessequal (x, M_LIT (0.0)))
    __set_errno (x < 0 ? EDOM : ERANGE);
  return M_LIT (1.0) / M_SQRT (x);
}
declare_mgen_alias (__rsqrt, rsqrt);
